Research on the smart modular cascaded solid state transformer interfaced to distributed photovoltaic power generation system

Zhao, Haisen; Zhu, Taiyun; Cheng, Daizhan; Li, Binbin; Ding, Jinjin; Li, Yuanzhi

doi:10.1049/joe.2017.0656

Cited by 16 publications

(8 citation statements)

References 10 publications

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“…This topology is used for the high power application; because the DAB topology can realize zero-voltage switching of power devices while minimizing the loss caused by the hard switching in the circuit [125]. Hereafter, another work suggested a threestage SST topology implemented with a boost converter which provided more features [125]. All the approaches could increase efficiency, reliability, and offer more advanced features than the conventional approach.…”

Section: ) Solar Photovoltaic Applicationmentioning

confidence: 99%

State of the Art of Solid-State Transformers: Advanced Topologies, Implementation Issues, Recent Progress and Improvements

et al. 2020

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Solid-state transformer (SST) is an emerging technology integrating with a transformer power electronics converters and control circuitry. This paper comprehensively reviews the SST topologies suitable for different voltage levels and with varied stages, their control operation, and different trends in applications. The paper discusses various SST configurations with their design and characteristics to convert the input to output under unipolar and bipolar operation. A comparison between the topologies, control operation and applications are included. Different control models and schemes are explained. Potential benefits of SST in many applications in terms of controllability and the synergy of AC and DC systems are highlighted to appreciate the importance of SST technologies. This review highlights many factors including existing issues and challenges and provides recommendations for the improvement of future SST configuration and development.

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Section: ) Solar Photovoltaic Applicationmentioning

confidence: 99%

State of the Art of Solid-State Transformers: Advanced Topologies, Implementation Issues, Recent Progress and Improvements

et al. 2020

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“…Considering the limitation of the range of d 14 , the upper limit of the saturation function is 1, while the lower limit is 0.5. 24,25 The voltage loop equation in PI control is given in (12).…”

Section: Figure 4 Topology Of Cdsm-mmc Based Grid-connection Stationmentioning

confidence: 99%

“…However, in large‐scale PV stations, because of factors such as technological and economic limitation of large‐capacity and high‐ratio power‐frequency transformers, the centralized configuration is no longer the best option 7. Therefore, the two‐stage and high‐gain DC/DC converter with a high‐frequency transformer, based on the existing low‐gain converter, is proposed and applied in the multistring‐configured grid‐connection system shown in Figure B …”

Section: Introductionmentioning

confidence: 99%

“…Therefore, the two-stage and high-gain DC/DC converter with a high-frequency transformer, based on the existing low-gain converter, is proposed and applied in the multistring-configured grid-connection system shown in Figure 1B. [10][11][12] To improve the control rapidity and accuracy during the voltage boost, the input-parallel output-series (IPOS) connected modular DC/DC boost converter can be adopted. 13,14 Furthermore, to reduce switching losses in two-stage voltage boost of the IPOS connected modular DC/DC converter, the one-stage multimodule boost full bridge isolation FIGURE 1 Schematic diagram of grid-connection systems of photovoltaic (PV) generation converter (BFBIC) was introduced in the previous studies.…”

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confidence: 99%

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DC‐type grid‐connection system of PV generation and its control schemes

Dai

Zhu

et al. 2019

Int Trans Electr Energ Syst

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Summary Compared with the AC‐type photovoltaic (PV) grid‐connection system, its DC counterpart has characteristics like simpler control mode, less power loss, and higher PV utilization. However, there are few researches that gave clearly the topology and control strategies of the DC‐type integration system of PV generation, especially systems with the multimodule boost full bridge isolation converter (BFBIC). In this paper, taking a pilot project as an example, the topology and control strategies of the DC‐type grid‐connection system are given. Models of the PV cell, the BFBIC, and the clamp double submodule (CDSM)‐based modular multilevel converter (MMC) are presented first. Then, the output voltage and power of PV are analyzed and compared. Suggestions on the application of the control strategy are given finally.

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“…A Figura 2 mostra um exemplo de arquitetura de rede inteligente. O sistema de controle permite a operação precisa dinâmica e estável, gerenciando o fluxo de energia entre sistemas de energia cc e ca, em média tensão (MT) e baixa tensão (BT), centros de geração e cargas [12].…”

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Estudo e Validação Experimental de um Conversor Multinível Modular Entrelaçado CA-CC Monofásico Para Aplicações de Transformadores de Estado Sólido

Joca¹,

Barreto²,

Júnior³

et al. 2018

Eletrônica de Potência

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Este artigo tem como objetivo apresentar o estudo teórico e a obtenção de resultados experimentais de uma topologia monofásica baseada em um conversor multinível modular entrelaçado. A estrutura pode ser empregada como o estágio ca-cc em aplicações de transformador de estado sólido. O objetivo é a conexão entre uma rede elétrica ca de média tensão e uma rede cc de baixa tensão. A nova técnica de entrelaçamento divide as correntes através das pernas do conversor multinível modular e é responsável pela modulação de tensão nos submódulos. O transformador de média frequência de 10 kHz fornece isolação galvânica e conecta o conversor multinível modular entrelaçado a um conversor de ponte completa. As características do conversor são discutidas, considerando a estrutura, o princípio de operação, a técnica de modulação e o esquema de controle. O sistema de controle regula a corrente de entrada e a tensão de barramento, no lado de alta tensão, e a tensão de saída e o fluxo de potência bidirecional, no lado de baixa tensão. A validação experimental do conversor é feita com um protótipo de pequena escala.

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Research on the smart modular cascaded solid state transformer interfaced to distributed photovoltaic power generation system

Cited by 16 publications

References 10 publications

State of the Art of Solid-State Transformers: Advanced Topologies, Implementation Issues, Recent Progress and Improvements

State of the Art of Solid-State Transformers: Advanced Topologies, Implementation Issues, Recent Progress and Improvements

DC‐type grid‐connection system of PV generation and its control schemes

Estudo e Validação Experimental de um Conversor Multinível Modular Entrelaçado CA-CC Monofásico Para Aplicações de Transformadores de Estado Sólido

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